What is the minimum size for fire service mains as recommended by NFPA 24?

The minimum size for fire service mains as recommended by NFPA 24 is 6 inches. This standard is established to ensure that the fire service mains can adequately supply water to fire protection systems, such as sprinklers and standpipes, during an emergency situation. A 6-inch diameter pipeline provides sufficient flow capacity while maintaining adequate pressure, which is critical for effective fire suppression efforts.

Larger diameter mains may be necessary in certain contexts to accommodate higher demand, but a 6-inch minimum is a baseline requirement that balances capacity with feasibility for most private fire service applications. This consideration plays an essential role in ensuring that private fire service mains are both efficient and effective in delivering the necessary resources to combat fires when needed.